61287575 has 12 divisors (see below), whose sum is σ = 76737648. Its totient is φ = 48552000.

The previous prime is 61287563. The next prime is 61287581. The reversal of 61287575 is 57578216.

It is not a de Polignac number, because 61287575 - 2¹⁶ = 61222039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9326 + ... + 14475.

It is an arithmetic number, because the mean of its divisors is an integer number (6394804).

Almost surely, 2^61287575 is an apocalyptic number.

61287575 is a deficient number, since it is larger than the sum of its proper divisors (15450073).

61287575 is a wasteful number, since it uses less digits than its factorization.

61287575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23914 (or 23909 counting only the distinct ones).

The product of its digits is 117600, while the sum is 41.

The square root of 61287575 is about 7828.6381318848. The cubic root of 61287575 is about 394.2673488473.

The spelling of 61287575 in words is "sixty-one million, two hundred eighty-seven thousand, five hundred seventy-five".